ques for people using inno setup. Pre installation?

Hi, im using vbexpress edition and before im using clickonce as my deployment tool before but im having problem with registering ocx so i shifted to inno setup w/c resolves almost my problem with clickonce. I've found this thread http://www.vbforums.com/showthread.php?t=360427 on how to create a setup with .net framework. I tried the code under this thread but the problem is,, the Checking for .NET Framework is too slow! Is there a way to fasten this process?? And any idea to put the installation .net framework as a PRE-INSTALLATION NOT Post-Installation??? tnx a lot! more power to vbforums!